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A Study on the Improvement of Light-Extraction Efficiency of Organic Light-Emitting Diodes with a Use of Random-Textured Film

랜덤 택스쳐 필름을 이용한 유기 발광 소자의 광추출 효율 향상에 관한 연구

  • Kim, Hye Sook (Department of Information Display Engineering, Hongik University) ;
  • Hwang, Deok Hyeon (Department of Information Display Engineering, Hongik University) ;
  • Jang, Kyeong Uk (Department of Electrical Engineering, Gachon University) ;
  • Kim, Tae Wan (Department of Information Display Engineering, Hongik University)
  • 김혜숙 (홍익대학교 정보디스플레이공학과) ;
  • 황덕현 (홍익대학교 정보디스플레이공학과) ;
  • 장경욱 (가천대학교 전기공학과) ;
  • 김태완 (홍익대학교 정보디스플레이공학과)
  • Received : 2014.08.07
  • Accepted : 2015.06.19
  • Published : 2015.07.01

Abstract

An improvement of light-extraction efficiency of organic light-emitting diodes was studied by using random-textured films (RTF). Device was made in a structure of RTF/glass/ITO/TPD/$Alq_3$/LiF/Al. RTF mold was made by spreading PDMS solution on a sandpaper. By pressing this mold on the glass substrate pre-coated with ZPU material, the RTF was obtained. From this study, there was an improvement of external quantum efficiency by about 30% in the device with the random-textured film (RTF 40) compared to that of the reference one.

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